Device for measuring logs.



No. 627.948. Patented July 9, [90L 7 L. P. GQWART. DEVICE FOR HEASIIBINGLOGS.

' (Application. MN. m 18, 1901-) (No Model.) 2 Shoots-Shoal l.-

w .ZJ cowa zf No. 677,948. Patented July 9, I901.

L. P. comm.

DEVICE FOR MEASURING LOGS.

(Application filed 1m. 18, 1901. (No Modal.)

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UNITED STATES P TENT OFFICE.

LAURANCE P. COWART, OF BEDDING, TEXAS.

DEVICE FOR MEASURING LOGS.

SPECIFICATION formingpart of Letters Eatent No. 677,948, dated July 9,1901.

Application filed March 18, 1901- Serial No. 51,702. (No model.)

Texas, have invented certain new and useful Improvements in Devices forMeasuringLogs; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention is a device for measuring logs; and it consists of a pairof calipers, a measuring-segment, an arm, a plate, and a disk,containing figures, all constituting a device for measuring the numberof lumber feet in a log.

In the accompanying drawings, Figure 1 is a front elevation of myinvention.

Fig. 2 is a rear elevation of the same.

1 represents the left-hand leg of the calipers, and 2 represents theright-hand leg. 3 represents the feet. lrepresents the bodyor upper partof the left-hand leg, and 5 the body or upper part of the right-handleg. These parts are hinged together at their upper ends by a hinge 6.(See Fig. 2.)

Where the bodies 4 and 5 are joined to the legs there is in each body adepression, over which are secured plates 7 and 7. In one of thesedepressions issecured one end of a measuring-segment 8, while the otherend slides back and forth in the depression in the other leg. In theplate of the right-hand body is a thumb-screw 9 to set the feet 3 inposition. The said measuring -segment I is laid off into equal divisionsand numbered, beginning at 8 and running up to as many as may bedesired. In my drawings,however, I have not extended the measurementabove twenty divisions, deeming that sufficient to illustrate my device.Each division represents an inch at the feet 3. Thus when the right-handplate 7 is at division 12 the feet are just twelve inches apart and whenat 2O the feet are just twenty inches apart. Secured to the face andleft-hand end of the measuring-segment 8 is one end of an arm 10, theother end being secured to the front face and upper end of the left-handleg of the calipers, said arm being laid 011' into divisionsrepresenting feet from ten to thirty, and-journaled between the upperend of this arm 10 and the upper part of the left-hand leg is a disk 11.This disk is divided into circles which correspond to the divisions laidoff on the arm 10. Said circles are divided into twenty-seven radialdivisions, and just inside of the inner circle is a circle of figures,one in each radial division, running from 8 to 27, thus completing thecircle. The

radial divisions between each circle are filled with figures, which, incombination with the figures on the measuring-segment 8, arm 10, and thefigures inside of the inner circle, form a device for measuring thenumber of lumber feet in a log. On the front face and 7 body 4 andextending beyond the left-hand edge of the sameis secured a plate 12.(See Fig. 2.) l v By turning the device over it will be seen that therear part of the disk is a duplicate of the front part, except as to thefigures, and on the rear side of the plate 12 are divisions and figures,indicating the length of a log from thirty-two to forty-eight feet, andthe circular divisions on this rear side of the disk correspond exactlyto the divisions on the plate 12, and the figures on theinside of theinner circle, which run from 12 to 27, taken in connection with the legs1, measuring-segment 8, plate 12, and the figures thereon, constitute adevice for ascertaining the number of lumber feet in a log. Hence thewhole device, as illustrated, will give the number of lumber feet in alog from eight to twenty-seven inches in diameter and from ten toforty-eight feet long.

The measuring capacity of this device may be increased by increasing thesize of the calipers, the length of the arm 10, plate 12, and the sizeof the disk and increasing the number of radial and circular divisionson its faces.

With this device, as illustrated,we can ascertain the nuinberof lumberfeet in any log running from eight to twenty-seven inches in diameterand from ten to forty-eight feet in length. Thus if we set the caliperswith the figure 12 exactly at the left-hand edge of the plate 7 the feet3 will just be twelve inches apart, and then we tighten the thumb-screwand step the log, and if the log be ten feet long the amount of lumberin it will be forty-eight feet, and if thirty feet long the amount oflumber in it will be one hundred and fiftythree feet, and if the log betwenty-seven inches in diameter and thirty feet long it will containeight hundred and sixty-two feet. This is the extent of the scale of thefront face of the disk. Now if we turn the device over and find the logto be twenty inches in diameter and thirty-two feet long it will containfour hundred and eighty feet, and if twenty-seven inches in diameter andfortyeight feet long it will contain fourteen hundred and twenty-eightfeet. Thus it will be seen by this combination device we always have adevice with which we can measure the diameter and length of a log and bysimply turning the disk instantly find the number of feet therein.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. A log-measuring device, consisting of a pairof calipers, havingameasuring-segment, divided into numbered divisions; a thumbscrew adaptedto set the feet of said calipers; a plate secured to the upper part ofone of the legs; the rear face of said plate divided into numbereddivisions from 32 to 4:8, representing the number of length feet in alog; an arm divided into numbered divisions from 10 to30,representingthelength feet in a log, and havingone end secured to oneend of the measuring-segment, and the other end to the upper end of oneof the legs of the calipers; a disk divided into radial and circularspaces on its front and rear faces and journaled beer /94s tween the armand upper part of one of the legs; said radial and circular spaces beingfilled with figures adapted to assist in deter mining the number oflumber feet in alog, said legs, segment, plate, arm and disk togetherwith the figures thereon, constituting a device for measuring andascertaining the number of lumber feet in a log, substantially as shownand described and for the purposes set forth.

2. A log-measuring device, consisting of a pair of calipers; ameasuring-segment 8; a thumb-screw 9, for holding the feet 3, inposition; a plate 12, secured to the upper part of one of the legs, andbearing lines and figures on its rear face; an arm 10, one end securedto the upper partof one of the legs, the other end to one end of themeasuringsegment, and bearing lines and figures on its front face; adisk journaled between said arm and upper part of one of the legs, andbearing on its frontand rear faces, radial and circular lines andfigures adapted to assist in determining the nu mber of lumber feet in alog; said calipers, measuring-segment, plate, arm, disk, lines andfigures arranged to measure and ascertain the number of lumber feet in alog, substantially as shown and described and for the purposes setforth.

In testimony whereof I afiiX my signature in presence of two witnesses.

LAURANCE P. COWART.

Witnesses:

JAMES L. KIRBY, W. P. MAYO.

